[PATCH] D66438: [llvm-extract] Update the help message for group extraction feature

[Jinsong Ji via Phabricator via llvm-commits]

jsji created this revision.
jsji added reviewers: qcolombet, volkan.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

https://reviews.llvm.org/D60973 exposed the group extraction feature of
the BlockExtractor to llvm-extract.
However, the help message was not updated, so users might not be able to
know how to use this feature without looking into history/commits.

This patch just update the help message to show how to use this group
extraction feature.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D66438

Files:
  llvm/tools/llvm-extract/llvm-extract.cpp


Index: llvm/tools/llvm-extract/llvm-extract.cpp
===================================================================
--- llvm/tools/llvm-extract/llvm-extract.cpp
+++ llvm/tools/llvm-extract/llvm-extract.cpp
@@ -74,8 +74,11 @@
 
 // ExtractBlocks - The blocks to extract from the module.
 static cl::list<std::string> ExtractBlocks(
-    "bb", cl::desc("Specify <function, basic block> pairs to extract"),
-    cl::ZeroOrMore, cl::value_desc("function:bb"), cl::cat(ExtractCat));
+    "bb",
+    cl::desc("Specify <function, basic block[;group]> pairs to extract, "
+             "region must be single entry."),
+    cl::ZeroOrMore, cl::value_desc("function:bb[;bb2...]"),
+    cl::cat(ExtractCat));
 
 // ExtractAlias - The alias to extract from the module.
 static cl::list<std::string>


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